1. How often do you wash?

Every 2 days. But I have A LOT of nappies (he had about 50-60 at newborn - I have lessened them now )

2. Whats your routine, eg - do you have a bin in the babys room/nursery - or do you take them straight into the laundry to a dry pail, etc? (I wouldn't keep pooey ones in the room )

Get rid of the poo in the loo and then straight into a dry bucket in the laundry and put the lid on

3. Do you put all nappies in together (as far as poo ones & wet ones)

Yep

4. What do you wash with (washing powder/bi carb/vinegar etc?)

Usually bicarb only, or 1/3 scoop of washing powder - what ever is on hand

Also another question because I mostly wash in bicarb soda & white vinegar... is this harmful for MCN's?I can't imagine it would be for prefolds & covers (it hasn't ruined any of our clothes/work things) - but just checking

Bicarb is fine, but vinegar ruins the PUL and elastic over time

Is there anything (washing products etc) I can use to help keep the quality in them?

hang them sideways on the line
limit dryer time